Facebook accounts getting blocked after few posts

Guys, if you want to spam the shit of Facebook, you have to do it in a smart way. Of course Facebook will catch you ni the long run, but that's the game. So ask yourself the good question:
What does make your bot trigger the spam flag? Start by thinking that everything unnatural will trigger a spam alert and you'll always be one step ahead.
So what is considered unnatural?
- An account that does nothing but posting in groups? Yeah, probably.
What's the solution?
- Mix that mass group post with mass activities: Friend requests there and there, liking comment, commenting, posting things on your wall, sending private dummy messages between your fake accounts, liking page, disliking one etc etc.
It might sounds complicated but it's not. A spam algorithm is nothing but rules & numbers. If your account seems like a real account, you will never ever get banned. It's simple as that

I thought that only Discuss banned domains entirely, but Facebook does it as well. Watch out with the spam folks, Facebook is serious about it. Anyone knows how long a domain gets banned on FB (might be infinite?).